You can use any small pump that will make 30-50 PSI. The Lincoln unit uses one that looks like a popular brand camper water system pump, but 120VAC and continuous duty. You can use a large quantity of water or a cooling coil from an air conditionar and a fan.
For a really low buck operation, just use tap water and run the discharge to a drain. It is better if the machine has a water selanoid valve if You are in humid conditions. Yours might be too new for that.